<template>
  <div class="slide-show" @mouseover="clearInv" @mouseout="runInv">
    <div class="slide-img">
      <a :href="slides[nowIndex].href">
        <transition name="slide-trans">
          <img v-if="isShow" :src="slides[nowIndex].src">
        </transition>
        <transition name="slide-trans-old">
          <img v-if="!isShow" :src="slides[nowIndex].src">
        </transition>
      </a>
    </div>
    <h2>{{ slides[nowIndex].title }}</h2>
    <ul class="slide-pages">
      <li @click="goto(prevIndex)">&lt;</li>
      <li v-for="(item, index) in slides"
          @click="goto(index)"
      >
        <a :class="{on: index === nowIndex}">{{ index + 1 }}</a>
      </li>
      <li @click="goto(nextIndex)">&gt;</li>
    </ul>
  </div>
</template>

<script>
  import index from "../router/index";

  export default {
    props: {
      slides: {
        type: Array,
        default: []
      },
      inv:{
        type:Number,
        default:1000
      }
    },
    name: 'hello',
    data() {
      return {
        msg: 'Hello World',
        nowIndex: 0,
        isShow:true
      }
    },
    computed:{
      prevIndex(){
        if(this.nowIndex===0)
          return this.slides.length-1
        else
          return this.nowIndex -1
      },
      nextIndex(){
        if(this.nowIndex===this.slides.length-1)
          return 0
        else
          return this.nowIndex +1
      }
    },
    methods: {
      goto(index) {
        this.isShow=false
        setTimeout(()=>{
          this.isShow=true
          this.nowIndex=index
          this.$emit('onchange',index)
        },10)
      },
      runInv(){
        this.invId=setInterval(()=>{
          this.goto(this.nextIndex)
        },this.inv)
      },
      clearInv(){
        clearInterval(this.invId)
      }
    },
    mounted() {
      this.runInv()
      //console.log(this.slides)
    }
  }
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->

<style scoped>
  .slide-trans-enter-active {
    transition: all .5s;
  }

  .slide-trans-enter {
    transform: translateX(900px);
  }

  .slide-trans-old-leave-active {
    transition: all .5s;
    transform: translateX(-900px);
  }
  .slide-show {
    position: relative;
    margin: 15px 15px 15px 0;
    width: 900px;
    height: 500px;
    overflow: hidden;
  }

  .slide-show h2 {
    position: absolute;
    width: 100%;
    height: 100%;
    color: #fff;
    background: #000;
    opacity: .5;
    bottom: 0;
    height: 30px;
    text-align: left;
    padding-left: 15px;
  }

  .slide-img {
    width: 100%;
  }

  .slide-img img {
    width: 100%;
    position: absolute;
    top: 0;
  }

  .slide-pages {
    position: absolute;
    bottom: 10px;
    right: 15px;
  }

  .slide-pages li {
    display: inline-block;
    padding: 0 10px;
    cursor: pointer;
    color: #fff;
  }

  .slide-pages li .on {
    text-decoration: underline;
  }
</style>
